Micrometer-gage.



W. J. BELCHER.

MICRQMETER GAGE. APPLICATION FILED FEB. I9, 1912.

1,16, Patelited Feb. 1,1916.

mam

WITNESSES.-

THE COLUMBIA FLANOGRAPH CO., WASHINGTON, D. c

annexes;

ed new a'ndus v iete-rtlages, of which the 'i ollowing'isa u'ranann a. BELorinn, or HARTFORD, coNNEcrIoU'r.

\ Specification of hetterslfatent.

.IYIICROMETER-GAGE.

Patented n t. rare;

Applicationfiled February 19, 1912. Serial No. 678,582.

To all whom it may concern.

Be 1t lni'own' that I, WARREN J. BELGHER,

"a citizen-b1"- the-United States golf America,

residingat Hartford, in the countylorf l-lartford and State of Connecticut, have inventil Improvements in lillcromspecification; I V

This invention relates to that class of measuring machines in which very small measurements are made with accuracy and speed. Many devices have been patented to make such measurementsbut'they are for the most part complicated and liable to get [out'of order, and in addition a skilled person must do the work, if satisfactory results are to be obtained.

I it is the object of this invention to provide a' micrometer gage arranged to enable an unskilled'person to make extremely small 'm'eastn'ements with accuracy and-speed.

Another object of the invention is to provide a measuring instrument using the principleof the well-known micrometer callpermg instrument, so arranged that the instrument may be operated by the movement of the part to be measured.

eter calipering instruments have been arr ranged to give multiplled readings of the in- Another object is to provide an instrument where large movements (as compared to the distances measured) of the partseither the actual measur ng parts or the indicating parts, or bothare necessary for extremely small measurements.

. Another object oi the invention is to provide an instrument of the class above .men-; tioned where a, large movement of the measuring part in one direction is required to give a small movement of the, measuringpart in the same direction as the measure-- ment is being taken.

Another object of the inventionis' to so combine two micrometer screws that one can be used for one purpose which is re Another object of the inventionis to make such a in an economical mannenof few parts, and not liable to get out of order when handled by an unskilled person.

l Vlnle I am aware that ordinary m1cromdicating part, I considerthat in the manner of measuring parts either, by multipliedmovements of the actual measuring part or terior of the member 9.

" function,

the ndicating parts orjboth, as compared to the" length being measured no in'stru- :ment has leretoi'ore been lmown or used having the functions of the are herewith disclosed; L i

llhththese ob ects in view, acompl'ete. c understanding of the invention may be had from thefollowing description and accompanying drawings, in which, i t

Figure l is a side view of the assembled 5 gage with part shown in section to better disclose the structure. Fig. 2 is a plan view of the assembled gage. i ii The principle of the micrometer caliper is used in this invention. The adaptation of this principle in a novel manner gives the results desired. The frame a has an anvil (Z thereon immediately below the movable spindle 0. The gthimble a is mounted, as usual, above and aroundthe sleeve 7) which 18 mountedionn,

and supportedbv an arm bl l-he l'atter",is" fastened to the top portion ofthe micrometer screw h by means of a set screw u and a split portion '0 in the arm 6 as clearly indicated in Fig. 1. The support for the screw h is furnished by an overhanging arm- 9 integral with the frame e. In the arm {7 is an externally tapered and interiorly threaded sleeve g, the lower portion thereof passing through the arm f/ and being se cured thereto by a nut t, as clearly shown in r Fig. l. The threads on the micrometer screw It engage with the threads on the inh Means fortaking up the wear on the parts is provided .by the tapered member 9 andthelnut t whichiop crate in an obvious way to perform this In order to obtaina reading ofany movement of the screw h ascale 0 is fastened to: the frame 6 over which a pointerj isar rangedto pass. An extension on the lower end of the micrometerscrew It provides a part on which one end of the pointer-j is made fast by a split sleeve 0: anda set screwy so that whenever the micrometer screw moves through a'small angle the other end of the pointer y will pass across the scale 0 through a magnified arc of that. angle. Where desiredthe pointer 9' can have a normal position to which-it will always return after any movement. As shown, this normal position is provided for by the arm on having-astop-pin Z. One end of a spring is 4e scale at a distance from the axis of the is fast to pin The other end of the spring 7c is fastened to the pointer j.

The preferred operation is as follows: A-

master piece of exactly the desired thickness is placed on the anvil cl. A skilled person sets the gage by bringing the movable spindle against the master piece with just the right amount of pressure, with the pointer at zero, after which the movable "spin dleis fastened in place by a screw 1) -shown in F ig. 1.,and the master piece is rem'oved. An unskilled person may now use the gage. After the spindle 0 has been set the anvil and. the spindle.

through which the micrometer screw it is turned to allow the piece to pass under spindle 0 1s indicated on the scale. If, on I theother hand, the partis too large, the

with the pointer at zero, the pointer will be turned to minus .001 by the spring 70 as soon as it is freed by the operator, in which posi- "tion it rests against the stop-pin m. A part to be measured is placed on the anvil cl and slid therealong between it and the spindle 0. If the part is smaller by less than .001 than the master piece the scale will show how much, for the spindle 0 is turned a certain distance by the movement of the piece along the anvil and this movement turns the micrometer screw-h to raise the spindle 0 high enough to allow the piece to pass between The distance scale will indicate the amount, for before a the part can pass under the spindle c, the

micrometer screw h will turn through a cer tam angle. This movement is in a direction to turn the micrometer screw it to raise said screw through its engagement with the 7 threads in the arm 9. The arm I) and the spindle'c are raised at the same time.

It is apparentthat the micrometer screw can move through a considerable angle,

' while raising the spindle c a small distance, gandsince this angle is read by the movement of the pointer j traveling across a angular movementjaccurate mi'crometric measurements of the distance between the anvil d and the spindle 0 are readily obfsb. tained by any un d P As an example of the use of the gage eonsider the following: It is desired to keep certain parts within the limits of onethousandths of an inch plus, and onethousandths minus the master piece. The scale 0 is calibrated to read plus and minus parts ofvan inch, as indicated inFig. 2. The pointer j is placed at zero, while the skilled operator sets the. movable spindle by the master piece, as described. The spring k then brings the pointer j to minus .001; Now the unskilled operator may slide the pieces to be gaged 'underthe spindle 0, as described, throwing out the under sized parts readily, and taking care to see that the pointer moves past plus .001 on the scale in throwing out the over-sized ones. In this way the work of gaging parts can proceed rapidly.

While applicant has described one form of his invention and the use thereof, other forms of apparatus may embody the invention broadly and any form of the invention can be put to use in measuring instruments of a certain class. Therefore applicant does not desire to limit himself to the specific form and use of the invention described, but wishes the protection defined in the following claims.

What I claim, is

l. A measuring instrument comprising, in combination, a micrometer screw, a part having threads which said screw engages, a base, an arm fixed to said screw to swing therewith and over said base, whereby said arm is raised and lowered with respect to the base, all for the purpose described.

2. A measuring instrument comprising, in combination, a micrometer screw, a part -having threads which said screw engages,

an arm fixed to one end of said screw, another arm fixed to the other end of said screw, both arms arranged to turn with said screw, a base arranged under the end of one arm, and a scale arranged under the second arm, said scale cooperating with said second arm to indicate the distance between the base and the arm above said base.

3. A measuring instrument comprising, in combination, a frame, a micrometer screw engaging threads in a portion of said frame, a scale adjacent the frame, two arms attached to said screw, one adapted to swing over the base of the frame and the other adapted to swing over the scale, said first mentioned arm having mounted therein a micrometer attachment with a spindle movable toward and from the base of the frame, all forthe purpose described.

4. A measuring instrument comprising, in combination, a frame, two arms each adapted to receive a micrometer screw, one of said arms being integral with said frame, a micrometer screw for each arm, one arm being fastened to the micrometer screw.

of the other arm and arranged to swing therewith to raise or lower the end of the spindle of its micrometer screw relative to the base of the frame, as described.

5. A micrometer caliper measuring instrument comprising, in combination, a. frame having an anvil thereon, an arm, a movable spindle, sleeve, and thimble all supported by said arm, a second arm having a micrometer screw engaged therein, a threaded support for said micrometer screw, said first arm fixed to the micrometer screw in said second mentioned arm for movement therewith, means locking the movable spindle in said first arm, when desired, to prevent movement relative thereto, said first 1 arm carried by and rotatable with the spindle and arranged to be moved toward and from the anvil, a second spindle mounted in said arm and adapted to be moved toward and from the anvil, all constructed and arranged to measure parts between the arm 1 and anvil.

WARREN J. BELGHER. Witnesses:

Gnonen L. MARSH, JAS. W. GREEN.

Wopies of this patent may be obtained for five cents each, by addressing the Commissioner of JPatents,

\ Washington, D. 0. 

